Es
the majority of egyptians live along the nile river and nile delta because
a)
land is inexpensive there.
arable land is located there.
the pyramids are located there.
important archaeological sites are there.

Assemblies do not have written codes of laws. laws are matters for magistrates and courts, not assemblies. codes of law are things such as civil law, criminal law, and constitutional law. what assemblies have are procedures regarding debating, voting and other business they might carry out.  also note that rome had three assemblies: the assembly of the soldiers, the assembly of the tribes, and the plebeian councils.